<!DOCTYPE html>
<html>
  <head>
    <meta name="viewport" content="initial-scale=1.0, user-scalable=no">
    <meta charset="utf-8">
    <title>Info windows</title>
    <style type="text/css">
		  html { height: 100% ; width: 100%}
		  body { height: 100%; width:100%; margin: 0; padding: 0 }
		  #map-canvas { height: 100%; width:100% }
	</style>
    
    <script src="https://maps.googleapis.com/maps/api/js?v=3.exp"></script>
    <script>
// This example displays a marker at the center of Australia.
// When the user clicks the marker, an info window opens.

function initialize() {
  var myLatlng = new google.maps.LatLng(-1.400000, -80.000000);
  var mapOptions = {
    zoom: 8,
    center: myLatlng
  };

  var map = new google.maps.Map(document.getElementById('map-canvas'), mapOptions);

  var contentString = '<div id="content">'+
      '<div id="siteNotice">'+
      '</div>'+
      '<h1 id="firstHeading" class="firstHeading">Uluru</h1>'+
      '<div id="bodyContent">'+
      '<p><b>Uluru</b>, also referred to as <b>Ayers Rock</b>, is a large ' +
      'sandstone rock formation in the southern part of the '+
      'Northern Territory, central Australia. It lies 335&#160;km (208&#160;mi) '+
      'south west of the nearest large town, Alice Springs; 450&#160;km '+
      '(280&#160;mi) by road. Kata Tjuta and Uluru are the two major '+
      'features of the Uluru - Kata Tjuta National Park. Uluru is '+
      'sacred to the Pitjantjatjara and Yankunytjatjara, the '+
      'Aboriginal people of the area. It has many springs, waterholes, '+
      'rock caves and ancient paintings. Uluru is listed as a World '+
      'Heritage Site.</p>'+
      '<p>Attribution: Uluru, <a href="http://en.wikipedia.org/w/index.php?title=Uluru&oldid=297882194">'+
      'http://en.wikipedia.org/w/index.php?title=Uluru</a> '+
      '(last visited June 22, 2009).</p>'+
      '</div>'+
      '</div>';

  var infowindow = new google.maps.InfoWindow({
      content: contentString
  });

  var marker = new google.maps.Marker({
      position: myLatlng,
      map: map,
      title: 'Uluru (Ayers Rock)'
  });

  var marker2 = new google.maps.Marker({
      position: new google.maps.LatLng(-38.422005,-123.084095),
      map: map,
      title: 'Uluru (Ayers Rock)'
  });
  google.maps.event.addListener(marker, 'click', function() {
    infowindow.open(map,marker);
  });
  google.maps.event.addListener(marker2, 'click', function() {
	    infowindow.open(map,marker2);
	  });
}

google.maps.event.addDomListener(window, 'load', initialize);

    </script>
  </head>
  <body>
    <div id="map-canvas" style="height:500px; width:700px"></div>
  </body>
</html>